Question

From the given options choose the criteria for sorting substances based on appearance.

• A. The object can be compressed or not.
• B. The object shines or not.
• C. The object is a conductor of electricity or not.
• D. The object is soluble in water or not.

Answer 1

The correct option is B The object shines or not.

Materials usually look different from each other. When we look at the objects then we find that some objects are shiny and some are not so shiny. That's because they reflect light in a different way. The way that these objects reflect light differently can be attributed to a property called 'lustre.'
We choose 'shine or not' in this case because that is the only criteria that judges appearance.
Conducting electricity makes no difference in the appearance of objects.
The solubility of a certain object cannot be defined just by looking at it.
Similarly, whether an object can be compressed or not, cannot be determined simply by looking at it.